Wrench



(No Mo deL) J. PQJOHNSON.

WRENCH.

Patented Mar. 22, 1898;

Evy. 2.

abliomwli o. WASNINGTON n c UNITED STATES PATENT OFFICE.

JOHN PETTER JOHNSON, or WESTBROOK, MINNESOTA.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 601,146, dated March22, 1898.

Application filed September 4, 1897. Serial No. 650,602. (No model.)

To all whom it may concern.-

Be it known that I, JOHN PETTER JOHNSON,

a citizen of the United States, residing at Westbrook, in the county ofCottonwood and State of Minnesota,have invented certain new and usefulImprovements in Wrenches; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to wrenches, and has for its object to provide aneffective wrench for tightening the cylinder-teeth onthreshing-machines.

The detailed objects and advantages of the invention will appear in thecourse of the subjoined description.

The invention consists in an improved wrench embodying certain novelfeatures and details of construction and arrangement of parts, ashereinafter fully described, illustrated in the drawings, andincorporated in the claim hereto appended.

In the accompanying drawings, Figure 1 is a perspective view ofa'wrench'constructed in accordance with the present invention. Fig. 2 isa detail section through the lower end of the wrench.

Similar numerals of reference designate corresponding parts in bothviews.

The, improved wrench contemplated in this invention comprises anirregularlyshaped stock 1, the same embodying lower and upper endportions 2 and 3, which extend in substantially parallel planes andwhich are con-, nected by an offset 4, formed on a compoundcurve,whereby the upper end portion 2 is arranged in alinement with and abovethe tooth to be operated upon, and this upperportion' at 5 receives across-head or handle 6, provided at its central portion with an openingto receive the stock 1, the handle being held thereon by means of a nut8 or in any convenient manner.

The lower end of the stock 1 is bent at a right angle to form a bracketor ear 9, comprising a ring or collar 10. Secured to the stock 1, at aslight distance from said ring or collar, is a second angular bracket11, having at its outer end a ring or collar 12, arranged immediatelyabove and in alinement with the ring 10. Journaled in said ringsis asleeve or chuck 13, having a circumferential series of teeth 14, whichwork between the two rings 10 and 12, thus preventing the accidentalescape of the sleeve or chuck. This chuck is provided with a squaredbore 15, adapted to fit the nuts on the teeth of the cylinder, wherebywhen the chuck or sleeve is turned the nuts will be turned in acorresponding direction.

Arranged between the brackets or ears is a two-edged dog 16, fulcrumedat an intermediate point on a bolt or pin 17 and backed up by anactuating-spring 19, which is arranged in such a manner as to hold oneend or the other of the dog in engagement with the teeth on the chuck orsleeve. The dog is made reversible, so that the wrench can be turned ineither direction for tightening or loosening the teeth of the cylinder.

By means of the wrench above described access may be readily obtained tothe nuts on the shanks of the cylinder-teeth without dismantling themachine. The wrench is exceedingly simple in construction and comprisesno delicate parts liable to get out of order.

7 Having thus described the invention, what is claimed as new, anddesired to be secured by Letters Patent, is

A wrench for adjusting nuts on cylinderseries of teeth lying between thecollars, and

a reversible two-edged spring-pressed dog fulcrumed on an axis parallelto the stock and engaging said teeth, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

JOHN PETTER JOHNSON.

Witnesses: W. A. SMITH, ANTON BERG.

